<template>
    <div>
      <!-- 面包屑导航区域 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>商品添加</el-breadcrumb-item>
      </el-breadcrumb>
      <el-card>
        <el-alert
          title="添加商品信息"
          type="info"
          center
          show-icon
          :closable="false">
        </el-alert>
        <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
          <el-step title="基本信息"></el-step>
          <el-step title="商品参数"></el-step>
          <el-step title="商品属性"></el-step>
          <el-step title="商品图片"></el-step>
          <el-step title="商品内容"></el-step>
          <el-step title="完成"></el-step>
        </el-steps>
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px"><el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品分类" prop="goods_number">
              <el-cascader v-model="addForm.goods_cat" :options="cateList" :props="{ expandTrigger: 'hover', label : 'cat_name', value : 'cat_id', children : 'children'}" @change="handleChange"></el-cascader>
            </el-form-item>
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="e" v-for="(e,i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item v-for="item in onlyTableData" :key="item.attr_id" :label="item.attr_name">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              action="http://www.klxin.cn:8888/api/private/v1/upload"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor
              v-model="addForm.goods_introduce">
            </quill-editor>
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
        </el-form>
      </el-card>
      <el-dialog
        title="图片预览"
        :visible.sync="previewVisible"
        width="40%">
        <img :src="previewPath" alt="" class="previewImg">
      </el-dialog>
    </div>
</template>

<script>
import _ from 'lodash'
export default {
  created () {
    this.getCateList()
  },
  data() {
    return {
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
        goods_cat: [{ required: true, message: '请选择商品分类', trigger: 'blur' }]
      },
      cateList: [],
      manyTableData: [],
      onlyTableData: [],
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previewVisible: false
    }
  },
  methods: {
    async getCateList () {
      let res = await this.$http.get(`categories`)
      // console.log(res)
      if (res.data.meta.status !== 200) { return this.$message.error(res.data.meta.msg) }

      this.cateList = res.data.data
    },
    handleChange() {
      // console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类')
        return false
      }
    },
    async tabClicked() {
      if (this.activeIndex === '1') {
        let res = await this.$http.get(`categories/${this.cateId}/attributes`,
          { params: {
            sel: 'many'
          } })
        // console.log(res)
        if (res.data.meta.status !== 200) {
          return this.$message.error(res.data.meta.msg)
        }
        res.data.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split('')
        })
        this.manyTableData = res.data.data
        // console.log(this.manyTableData)
      } else if (this.activeIndex === '2') {
        let res = await this.$http.get(`categories/${this.cateId}/attributes`,
          { params: {
            sel: 'only'
          } })
        // console.log(res)
        if (res.data.meta.status !== 200) { return this.$message.error(res.data.meta.msg) }
        this.onlyTableData = res.data.data
        // console.log(this.onlyTableData)
      }
    },
    handlePreview(file) {
      // console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    handleRemove(file) {
      // console.log(file)
      const filePath = file.response.data.tmp_path
      const index = this.addForm.pics.findIndex(i => {
        return i.pic === filePath
      })
      this.addForm.pics.splice(index, 1)
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
      console.log(response)
      // 1. 拼接得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 2. 将图片信息对象，push 到pics数组中
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm)
    },
    add() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请完善商品信息')
        } else {
          const formData = _.cloneDeep(this.addForm)
          formData.goods_cat = formData.goods_cat.join(',')
          this.manyTableData.forEach(item => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_value: item.attr_vals.join('')
            }
            this.addForm.attrs.push(newInfo)
          })

          this.onlyTableData.forEach(item => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_value: item.attr_vals
            }
            this.addForm.attrs.push(newInfo)
          })
          formData.attrs = this.addForm.attrs
          // console.log(formData)
          let res = await this.$http.post('goods', formData)
          // console.log(res)
          if (res.data.meta.status !== 201) {
            return this.$message.error(res.data.meta.msg)
          }
          this.$message.success(res.data.meta.msg)
          this.$router.push('/goods')
        }
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-steps {
  margin-bottom: 30px;
}
.el-form-item {
  margin-bottom: 70px;
}
.el-checkbox {
  margin: 0 10px 0 0
}
.previewImg {
  width: 100%;
  height: 100%;
}
.btnAdd {
  margin-top: 10px
}
</style>
